What type of pressure gauge is specifically used to measure very small pressures?

A diaphragm-type pressure gauge is designed to measure small pressures due to its sensitivity and operational principles. These gauges utilize a flexible diaphragm that deforms in response to pressure changes. This deformation is then translated into a readable output, allowing for accurate measurement of very low pressures. The use of a diaphragm ensures that even slight variations in pressure can result in noticeable movements, making these gauges particularly effective in applications requiring precise monitoring of small pressure changes.

Furthermore, diaphragm-type gauges can be constructed with various materials and configurations to optimize their sensitivity for specific pressure ranges, making them highly adaptable for different low-pressure scenarios. This capability is not typically found in general-purpose gauges or those meant for higher pressure ranges, further emphasizing the appropriateness of diaphragm gauges for small pressure measurements.